后花园 (hòuhuāyuán) is a noun meaning 'back garden' or 'backyard.' It combines 后 (back/rear), 花 (flower), and 园 (garden), originally referring to a private garden behind a residence. It can also be used figuratively to mean someone's private domain or sphere of influence.
奶奶家的后花园种满了各种花草。
nǎinai jiā de hòu huāyuán zhǒng mǎn le gè zhǒng huācǎo.
Grandma's backyard garden is filled with all kinds of flowers and plants.
小时候我们常在后花园里捉迷藏。
xiǎo shíhòu wǒmen cháng zài hòu huāyuán lǐ zhuō mícáng.
When we were little, we often played hide-and-seek in the backyard garden.
他把阳台改造成了一个小小的后花园。
tā bǎ yángtái gǎizào chéng le yī gè xiǎo xiǎo de hòu huāyuán.
He converted the balcony into a small backyard garden.